The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 1978
Filed:
Feb. 09, 1977
Applicant:
Inventors:
Piero L Nannelli, King of Prussia, PA (US);
Harold G Monsimer, East Norriton, PA (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C08G / ;
U.S. Cl.
CPC ...
2605 / ; 260 / ; 2605 / ; 2606 / ;
Abstract
Phosphinic acids of the formula ##STR1## wherein (A) R is ##STR2## (1) X is 3-phenylene or 4-phenylene, and (2) Y is a direct bond, ##STR3## (B) R' is R, lower alkyl of from 1 to 3 carbon atoms, 4-biphenylyl, or phenyl. These acids are neutralized with an equivalent amount of alkali metal carbonates to form alkali metal salts which react with ZnCl.sub.2 to form polymers having high thermal stability.